#!/bin/bash

# Get the current public IP address.
NEW_IP=$(curl -s https://ipv4.sequoia.sh)

echo "$NEW_IP"

# Check if the file containing the last IP exists.
if [ ! -f "$LAST_IP_FILE" ]; then
	echo "Last IP file not found. Creating a new one and updating DNS."
# Write the new IP to the file for the first run.
	echo "$NEW_IP" > "$LAST_IP_FILE"
	LAST_IP="" # Treat this as a change
else
# Read the last stored IP address.
	LAST_IP=$(cat "$LAST_IP_FILE")
fi

# Compare the current IP with the last stored IP.
if [ "$NEW_IP" != "$LAST_IP" ]; then
# --- IP has changed ---
	echo "IP has changed from $LAST_IP to $NEW_IP. Updating DNS and sending email."

# Update the DNS zone files using the new IP.
# The 'template' command requires the full path.
	echo "$NEW_IP" | template --stdin --stdin --stdin --stdin /var/www/lakefox/build/zones/lakefox.net > /etc/bind/zones/lakefox.net
	echo "$NEW_IP" | template --stdin /var/www/lakefox/build/zones/asftp.sh > /etc/bind/zones/asftp.sh
	echo "$NEW_IP" | template --stdin /var/www/lakefox/build/zones/grimui.com > /etc/bind/zones/grimui.com
	echo "$NEW_IP" | template --stdin /var/www/lakefox/build/zones/decode.sh > /etc/bind/zones/decode.sh
	echo "$NEW_IP" | template --stdin /var/www/lakefox/build/zones/szn.io > /etc/bind/zones/szn.io
	echo "$NEW_IP" | template --stdin /var/www/lakefox/build/zones/lfx.lol > /etc/bind/zones/lfx.lol

# Reload the BIND DNS server.
	systemctl reload bind9

# Update the stored IP address for the next run.
	echo "$NEW_IP" > "$LAST_IP_FILE"

# Send an email with the new IP address.

# Format for .ipnotify.env

# /home/$USER/.ipnotify.env     (or any path you like)
# SMTP_USER='email@email.com'
# SMTP_PASS='your-app-password'
# SMTP_HOST='smtp.gmail.com'
# SMTP_PORT='465'                 # 465 = SMTPS, 587 = STARTTLS



# --- load secrets ---
	source /home/$USER/.ipnotify.env

# --- send via curl ---
	curl --ssl-reqd \
		--url "smtps://${SMTP_HOST}:${SMTP_PORT}" \
		--user "${SMTP_USER}:${SMTP_PASS}" \
		--mail-from "${SMTP_USER}" \
		--mail-rcpt "${EMAIL_ADDRESS}" \
		--upload-file - <<<"From: ${SMTP_USER}
To: ${EMAIL_ADDRESS}
Subject: Public IP Address Changed

New IP Address: ${NEW_IP}
"

else
	# --- IP is the same ---
	echo "IP address has not changed ($NEW_IP). No action taken."
fi